AIDS-144906 AIDS144906 Methyl 6,9,12,15,18,21,24,27-octakis(1H-indol-3-ylmethyl)-2,2-dimethyl-4,7,10,13,16,19,22,25-octaoxo-3-oxa-5,8,11,14,17,20,23,26-octaazaoctacosan-28-oate NSC668430